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/*
* Copyright (c) 2016 Boris Astardzhiev, Smartcom-Bulgaria AD
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice(s), this list of conditions and the following disclaimer as
* the first lines of this file unmodified other than the possible
* addition of one or more copyright notices.
* 2. Redistributions in binary form must reproduce the above copyright
* notice(s), this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/socket.h>
#include <errno.h>
#include <poll.h>
#include <stddef.h>
#include "libc_private.h"
ssize_t
recvmmsg(int s, struct mmsghdr *__restrict msgvec, size_t vlen, int flags,
const struct timespec *__restrict timeout)
{
struct pollfd pfd[1];
size_t i, rcvd;
ssize_t ret;
int res;
short ev;
if (timeout != NULL) {
pfd[0].fd = s;
pfd[0].revents = 0;
pfd[0].events = ev = POLLIN | POLLRDNORM | POLLRDBAND |
POLLPRI;
res = ppoll(&pfd[0], 1, timeout, NULL);
if (res == -1 || res == 0)
return (res);
if (pfd[0].revents & POLLNVAL) {
errno = EBADF;
return (-1);
}
if ((pfd[0].revents & ev) == 0) {
errno = ETIMEDOUT;
return (-1);
}
}
ret = __sys_recvmsg(s, &msgvec[0].msg_hdr, flags);
if (ret == -1)
return (ret);
/*
* Do non-blocking receive for second and later messages if
* WAITFORONE is set.
*/
if (flags & MSG_WAITFORONE)
flags |= MSG_DONTWAIT;
rcvd = 1;
for (i = rcvd; i < vlen; i++, rcvd++) {
ret = __sys_recvmsg(s, &msgvec[i].msg_hdr, flags);
if (ret == -1) {
/* We have received messages. Let caller know
* about the data received, socket
* error is returned on next
* invocation.
*/
return (rcvd);
}
/* Save received bytes. */
msgvec[i].msg_len = ret;
}
return (rcvd);
}
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